Carrier 344424-751 Flame Sensor Kit

The Carrier 344424-751 Flame Sensor Kit is a critical safety component for professional furnace repair and routine preventive maintenance. As a genuine OEM furnace replacement part, this 14.5-inch white flame sensor is engineered to provide precise millivolt signaling to the integrated furnace control (IFC). It serves as the primary safeguard against "no-light" conditions by detecting the presence of a burner flame; if the HVAC flame sensor fails to sense ion flow within the ignition window, it immediately signals the gas valve to close, preventing hazardous unburnt gas accumulation. This Carrier flame sensor replacement is a direct-fit solution for technicians troubleshooting short-cycling, furnace ignition failure, or 3-flash error codes on Carrier, Bryant, and Payne gas furnaces. Constructed with high-grade porcelain insulation and a durable metal rod, the 344424-751 offers the high-temperature resistance necessary for long-term reliability in high-efficiency condensing furnaces and standard atmospheric burners. Utilizing factory-authorized parts ensures the flame rectification circuit maintains the exact microamp threshold required by the original equipment specifications.

Key Benefits for Contractors:

• OEM Precision: Guaranteed 344424-751 compatibility ensures the flame rectification process meets factory microamp requirements, preventing nuisance trips.
• Direct Replacement: Designed as a drop-in furnace flame sensor for parts 337945-444, PSE-CE37, and LH33WZ522, reducing truck stock complexity.
• System Safety: Restores reliable burner flame detection to protect the heat exchanger from potential damage caused by delayed ignition.
• Heavy-Duty Build: Features a 14.5-inch reach and robust white porcelain housing tailored for Carrier HVAC systems.

Common Technical Questions:

What are the symptoms of a failing Carrier 344424-751 flame sensor?
Technicians usually identify a faulty sensor when the furnace ignites but shuts down after 2 to 5 seconds. This "short cycling" often indicates the sensor is sooted, cracked, or chemically fatigued and can no longer conduct the necessary microamps to the control board.

Can this sensor be cleaned instead of replaced?
While light oxidation can sometimes be removed with a fine abrasive pad, professional best practice is replacement. Repeated cleaning thins the metal rod and degrades the porcelain, which can lead to intermittent signal loss and repeat service calls.

Is the 344424-751 compatible with other brands?
Yes, this is an OEM Carrier part that is also the factory-spec replacement for Bryant and Payne equipment. Always verify the part number against the specific furnace model number before installation.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.